The forger Fournier offers forgeries of the 5 D green and 10 D brown in his 1914 pricelist (first choice forgeries) for 2 Swiss Francs. On the same forgeries he also forged the overprints 1 D on 5 D green and the 2 D on 10 D brown (offere in his 1914 pricelist for 2 Swiss Francs). I have no further information on the distinguishing characteristics of these forgeries.